The formation of the Reserve Components was held to realize the mandate of the Republic of Indonesia Law Number 23 of 2019 concerning the Management of National Resources for National Defense. Reserve components are used to complement the defense components consisting of main components, reserve components and supporting components. The policy for the formation of reserve components is one of the strategies chosen as an early effort in order to increase strength and strengthen the capabilities of the main components that are ready to be deployed through mobilization in the face of military and hybrid threats. This research uses qualitative methods, while data collection uses literature review and semi-structured interviews. Indonesia needs the right strategy in the recruitment of prospective reserve component members. The results of the study explain that the reserve components have been used by Indonesia in strengthening the TNI, such as the Presidential Decree No. 2 of 1948 which contains mobilizing all citizens over the age of 16 to participate in the people’s resistance. During the liberal democracy period (1950-1959) it was known as the National Tjadangan Corps (CTN) which functioned for national mobilization. Observing the provisions of Law Number 23 of 2019 concerning PSDN, that the use of reserve components to deal with the threat of hybrids, Indonesia needs the right strategy in the recruitment and development of prospective reserve component members. Administrative requirements that are generally specified in the law, special requirements need to be added in order to be able to design reserve component personnel who have special abilities, for example, IT experts, chemical weapons and biological.